RICE and BAILEY: SURVIVAL, SIZE, AND EMERGENCE OF PINK SALMON 



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CONCENTRATION OF UN-IONIZED AMMONIA IN PPB 



Figure 2.— Length (upper) and weight (lower) of migrant pink salmon fry at emergence resulting from groups of alevins exposed to 

 various concentrations of un-ionized ammonia (NH3) for three lengths of long-term exposure. For each mean, n = 50 fry, bars indicate 

 95% confidence limits. Group A— exposed for 21 d just prior to migration; group B— exposed for 40 d, ending 21 d prior to migration; 

 group C — exposed for 61 d continuously until migration. Asterisks indicate significant differences in length or weight (P<0.05) 

 between those fry that had been exposed and control fry. 



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